Arnold Whitworth Boyd MC, MA, FZS, FRES, MBOU (20 January 1885 – 16 October 1959) was an ornithologist and naturalist from Altrincham, Cheshire, England.

Boyd was born on 20 January 1885.^[1] He was a long-time contributor to The Guardian 's "Country Diary" column, taking over a slot from his friend Thomas Coward in 1933, on the latter's death. In 1950, he revised Coward's The Birds of the British Isles and their Eggs for a new edition.

Boyd was uncle to James Fisher, who also became a leading ornithologist and natural history writer and broadcaster. Following Fisher's death, many of Boyd's diaries, other papers and related material were acquired by Liverpool Museum.^[2]

He made occasional radio appearances, such as a 1936 episode of My Week-End out of Doors on 'Cheshire Meres',^[3] and a 1957 Birds In Britain episode on great crested grebes, edited and introduced by his nephew James and produced by Winwood Reade.^[4][5]

Boyd died in Northwich, Cheshire on 16 October 1959.^[1]

• New Naturalist

• The Country Diary of a Cheshire Man. Collins. 1946.
• A Country Parish: Great Budworth in the county of Chester. New Naturalist. Collins. 1951.